Leatherman's Expanse series blades (861411) are all crafted from 154CM stainless steel that keep their edge three times as long as any regular stainless steel on the market. 154CM is used because it has even better edge retention, toughness and corrosion resistance and is the perfect size for simple tasks such as breaking down boxes, various camping chores, or opening up bottles with its attached Bottle Opener/Carabiner Clip. The e55b has the same strength as the e55, but in a 3.1" size. Also includes a Bit Driver with Bit Storage in the Handle. Included Bits: Phillips #1 and #2 Bit, Screwdriver 3/16" and 1/4" Bit. A stainless steel reinforced handle gives this knife a slim, sleek profile at only three ounces.